Beam-induced heating on the sector gate valve in the SPring-8-II storage ring

THP10
18 Sept 2025, 16:40
1h
The Loop

The Loop

Lund, Sweden
Poster Presentation Vacuum Thursday Poster Session

Speaker

Hiroshi Ota (Japan Synchrotron Radiation Research Institute)

Description

SPring-8-II is an upgrade project toward the 4th generation synchrotron light source to provide hard X-ray with nearly two-orders of magnitude higher brilliance than the current SPring-8. Low electron beam emittance less than 100 pm・rad for the high brilliance requires high gradient multi-pole magnets with a small bore radius and vacuum chambers with a narrow aperture. The SPring-8-II vacuum ducts passing through electron beam have a rhombic cross-section with a small dimension of 26.16 mm between opposing inner surfaces. Strong beam wake field due to the narrow aperture increases vacuum chamber heating, so its evaluation and countermeasures are an important issue. In particular, the heating of the sector gate valve (SGV) with RF shield structure inside, which requires high reliability, should be evaluated, and measures such as water cooling should be taken if necessary. In this presentation, we report the results of simulations using the Finite Element Analysis (FEA) code ANSYS to evaluate temperature rising at the SGV for SPring-8-II due to beam-induced heating and to determine whether forced cooling is necessary.

Author

Hiroshi Ota (Japan Synchrotron Radiation Research Institute)

Co-authors

Mitsuhiro Masaki (Japan Synchrotron Radiation Research Institute) Hideki Dewa (Japan Synchrotron Radiation Research Institute) Kazuhiro Tamura (Japan Synchrotron Radiation Research Institute, RIKEN) Masazumi Shoji (Japan Synchrotron Radiation Research Institute, RIKEN) Masaya Oishi (Japan Synchrotron Radiation Research Institute, RIKEN) Takemasa Masuda (Japan Synchrotron Radiation Research Institute) Yukiko Taniuchi (Japan Synchrotron Radiation Research Institute) Yosuke Ueda (Japan Synchrotron Radiation Research Institute) Shiro Takano (Japan Synchrotron Radiation Research Institute, RIKEN) Takahiro Watanabe (Japan Synchrotron Radiation Research Institute, RIKEN)

Presentation materials

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